Three Little Berries photo via LaneyButler's etsy, girl on car via a beautiful living, Eddie Ross's awesome light blue butler's pantry via eddie ross
It took me awhile to like this combination (and about 3 weeks to find the photos I liked for it)- mostly because outside of the stars and stripes, this combo has been attempted (and failed) many times before. What I think is key is to use muted, airy versions of red and blue with a lot of white. Nothing too saturated or it'll start looking like you just bought everything you saw at an after the 4th of July clearance sale (which unless you're going for a kitschy Independence Day theme, really isn't what you want.)